Fdisk/disklabel issue with install

[David Kanter <david.kanter@mindspring.com>]

I deleted an older OpenBSD partition to make way for a fresh, new 2.8 
install of a different partition size (no big deal). The problem is that 
something (disklabel?) refuses to recognize the new, smaller size of the 
partition set with fdisk. It wants to use to older, erased, size.

After running fdisk with the install disk and writing the new partition 
size, I came into disklabel which had the older disklabels already "known" 
(and their old sizes). Although fdisk had the last OpenBSD sector at about 
10 million, disklabel (in its introductory message) wanted to use up 
through 12 million (the older size). So I used the "b" disklabel option and 
reset the size, which seemed to work, until I finished running 
disklabel...and noticed that it still used the older size, even though 
fdisk had a partition that was 2 million sectors smaller?

Is there a way to erase the section of the disk that holds the disklabel 
info? On a fresh disk, writing with fdisk brings up a blue-highlighted 
message stating "No disklabel exists." But now that I once had OpenBSD on 
this disk, I get not such message after saving fdisk. How can I get to that 
virginal state?

Thanks.